121211020050 has 48 divisors (see below), whose sum is σ = 313673048640. Its totient is φ = 30917592640.

The previous prime is 121211020003. The next prime is 121211020069. The reversal of 121211020050 is 50020112121.

It is a super-2 number, since 2×121211020050² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17563365 + ... + 17570264.

It is an arithmetic number, because the mean of its divisors is an integer number (6534855180).

Almost surely, 2^121211020050 is an apocalyptic number.

121211020050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211020050 is an abundant number, since it is smaller than the sum of its proper divisors (192462028590).

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

121211020050 is a wasteful number, since it uses less digits than its factorization.

121211020050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35133667 (or 35133662 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 121211020050 its reverse (50020112121), we get a palindrome (171231132171).

The spelling of 121211020050 in words is "one hundred twenty-one billion, two hundred eleven million, twenty thousand, fifty".