121000101210 has 40 divisors (see below), whose sum is σ = 325355829876. Its totient is φ = 32266693440.

The previous prime is 121000101203. The next prime is 121000101217. The reversal of 121000101210 is 12101000121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121000101203) and next prime (121000101217).

It can be written as a sum of positive squares in 2 ways, for example, as 120018594969 + 981506241 = 346437^2 + 31329^2 .

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 = 121000101192 and 121000101201.

It is not an unprimeable number, because it can be changed into a prime (121000101217) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 74690611 + ... + 74692230.

Almost surely, 2^121000101210 is an apocalyptic number.

121000101210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121000101210 is an abundant number, since it is smaller than the sum of its proper divisors (204355728666).

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

121000101210 is a wasteful number, since it uses less digits than its factorization.

121000101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149382860 (or 149382851 counting only the distinct ones).

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

Adding to 121000101210 its reverse (12101000121), we get a palindrome (133101101331).

The spelling of 121000101210 in words is "one hundred twenty-one billion, one hundred one thousand, two hundred ten".