1021101420 has 48 divisors (see below), whose sum is σ = 3009565440. Its totient is φ = 257962176.

The previous prime is 1021101407. The next prime is 1021101457. The reversal of 1021101420 is 241011201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1021101396 and 1021101405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446712 + ... + 448991.

It is an arithmetic number, because the mean of its divisors is an integer number (62699280).

Almost surely, 2^1021101420 is an apocalyptic number.

1021101420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021101420 is an abundant number, since it is smaller than the sum of its proper divisors (1988464020).

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

1021101420 is a wasteful number, since it uses less digits than its factorization.

1021101420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895734 (or 895732 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1021101420 is about 31954.6775918644. The cubic root of 1021101420 is about 1006.9849041850.

Adding to 1021101420 its reverse (241011201), we get a palindrome (1262112621).

The spelling of 1021101420 in words is "one billion, twenty-one million, one hundred one thousand, four hundred twenty".