121211222010 has 32 divisors (see below), whose sum is σ = 295004218752. Its totient is φ = 31867738560.

The previous prime is 121211221997. The next prime is 121211222023. The reversal of 121211222010 is 10222112121.

It is an interprime number because it is at equal distance from previous prime (121211221997) and next prime (121211222023).

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 28451209 + ... + 28455468.

It is an arithmetic number, because the mean of its divisors is an integer number (9218881836).

Almost surely, 2^121211222010 is an apocalyptic number.

121211222010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211222010 is an abundant number, since it is smaller than the sum of its proper divisors (173792996742).

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

121211222010 is a wasteful number, since it uses less digits than its factorization.

121211222010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56906758.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121211222010 its reverse (10222112121), we get a palindrome (131433334131).

The spelling of 121211222010 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, ten".