121211201010 has 32 divisors (see below), whose sum is σ = 291226275072. Its totient is φ = 32287498880.

The previous prime is 121211200993. The next prime is 121211201011. The reversal of 121211201010 is 10102112121.

It is not an unprimeable number, because it can be changed into a prime (121211201011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2190219 + ... + 2244878.

It is an arithmetic number, because the mean of its divisors is an integer number (9100821096).

Almost surely, 2^121211201010 is an apocalyptic number.

121211201010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211201010 is an abundant number, since it is smaller than the sum of its proper divisors (170015074062).

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

121211201010 is a wasteful number, since it uses less digits than its factorization.

121211201010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4436018.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121211201010 its reverse (10102112121), we get a palindrome (131313313131).

The spelling of 121211201010 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred one thousand, ten".