121001121010 has 32 divisors (see below), whose sum is σ = 271545374592. Its totient is φ = 37714634880.

The previous prime is 121001120971. The next prime is 121001121049. The reversal of 121001121010 is 10121100121.

It is an interprime number because it is at equal distance from previous prime (121001120971) and next prime (121001121049).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78571387 + ... + 78572926.

It is an arithmetic number, because the mean of its divisors is an integer number (8485792956).

Almost surely, 2^121001121010 is an apocalyptic number.

121001121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121001121010 is an abundant number, since it is smaller than the sum of its proper divisors (150544253582).

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

121001121010 is a wasteful number, since it uses less digits than its factorization.

121001121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157144338.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121001121010 its reverse (10121100121), we get a palindrome (131122221131).

The spelling of 121001121010 in words is "one hundred twenty-one billion, one million, one hundred twenty-one thousand, ten".