121001021010 has 48 divisors (see below), whose sum is σ = 331160693760. Its totient is φ = 30568678560.

The previous prime is 121001021003. The next prime is 121001021051. The reversal of 121001021010 is 10120100121.

It is a happy number.

It is a super-2 number, since 2×121001021010² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121001020983 and 121001021001.

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, 35378706 + ... + 35382125.

It is an arithmetic number, because the mean of its divisors is an integer number (6899181120).

Almost surely, 2^121001021010 is an apocalyptic number.

121001021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121001021010 is an abundant number, since it is smaller than the sum of its proper divisors (210159672750).

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

121001021010 is a wasteful number, since it uses less digits than its factorization.

121001021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70760863 (or 70760860 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 121001021010 its reverse (10120100121), we get a palindrome (131121121131).

The spelling of 121001021010 in words is "one hundred twenty-one billion, one million, twenty-one thousand, ten".