121001210220 has 96 divisors (see below), whose sum is σ = 369660130560. Its totient is φ = 29329148160.

The previous prime is 121001210203. The next prime is 121001210227. The reversal of 121001210220 is 22012100121.

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 = 121001210196 and 121001210205.

It is not an unprimeable number, because it can be changed into a prime (121001210227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6890211 + ... + 6907749.

It is an arithmetic number, because the mean of its divisors is an integer number (3850626360).

Almost surely, 2^121001210220 is an apocalyptic number.

121001210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001210220 is an abundant number, since it is smaller than the sum of its proper divisors (248658920340).

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

121001210220 is a wasteful number, since it uses less digits than its factorization.

121001210220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28015 (or 28013 counting only the distinct ones).

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

Adding to 121001210220 its reverse (22012100121), we get a palindrome (143013310341).

The spelling of 121001210220 in words is "one hundred twenty-one billion, one million, two hundred ten thousand, two hundred twenty".