1421212650 has 192 divisors, whose sum is σ = 4214730240. Its totient is φ = 312364800.

The previous prime is 1421212621. The next prime is 1421212679. The reversal of 1421212650 is 562121241.

It is an interprime number because it is at equal distance from previous prime (1421212621) and next prime (1421212679).

It is a self number, because there is not a number n which added to its sum of digits gives 1421212650.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1264989 + ... + 1266111.

It is an arithmetic number, because the mean of its divisors is an integer number (21951720).

Almost surely, 2^1421212650 is an apocalyptic number.

1421212650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421212650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2107365120).

1421212650 is an abundant number, since it is smaller than the sum of its proper divisors (2793517590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421212650 is a wasteful number, since it uses less digits than its factorization.

1421212650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1216 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1421212650 is about 37698.9741239732. The cubic root of 1421212650 is about 1124.3107283966.

Adding to 1421212650 its reverse (562121241), we get a palindrome (1983333891).

It can be divided in two parts, 14212 and 12650, that added together give a palindrome (26862).

The spelling of 1421212650 in words is "one billion, four hundred twenty-one million, two hundred twelve thousand, six hundred fifty".