121312221030 has 192 divisors, whose sum is σ = 423490249728. Its totient is φ = 23268660480.

The previous prime is 121312220977. The next prime is 121312221067. The reversal of 121312221030 is 30122213121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121312220994 and 121312221012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 583194 + ... + 763373.

It is an arithmetic number, because the mean of its divisors is an integer number (2205678384).

Almost surely, 2^121312221030 is an apocalyptic number.

121312221030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121312221030 is an abundant number, since it is smaller than the sum of its proper divisors (302178028698).

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

121312221030 is a wasteful number, since it uses less digits than its factorization.

121312221030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346611 (or 1346608 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121312221030 its reverse (30122213121), we get a palindrome (151434434151).

The spelling of 121312221030 in words is "one hundred twenty-one billion, three hundred twelve million, two hundred twenty-one thousand, thirty".