121210000120 has 32 divisors (see below), whose sum is σ = 297515455920. Its totient is φ = 44076363520.

The previous prime is 121210000097. The next prime is 121210000151. The reversal of 121210000120 is 21000012121.

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

It is a junction number, because it is equal to n+sod(n) for n = 121210000097 and 121210000106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137738197 + ... + 137739076.

Almost surely, 2^121210000120 is an apocalyptic number.

121210000120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210000120 is an abundant number, since it is smaller than the sum of its proper divisors (176305455800).

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

121210000120 is a wasteful number, since it uses less digits than its factorization.

121210000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275477295 (or 275477291 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 121210000120 its reverse (21000012121), we get a palindrome (142210012241).

The spelling of 121210000120 in words is "one hundred twenty-one billion, two hundred ten million, one hundred twenty", and thus it is an aban number.