1221010020130 has 32 divisors (see below), whose sum is σ = 2322029640960. Its totient is φ = 460991139840.

The previous prime is 1221010020119. The next prime is 1221010020137. The reversal of 1221010020130 is 310200101221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221010020130.

It is not an unprimeable number, because it can be changed into a prime (1221010020137) 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, 11805279 + ... + 11908258.

It is an arithmetic number, because the mean of its divisors is an integer number (72563426280).

Almost surely, 2^{1221010020130} is an apocalyptic number.

1221010020130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221010020130 is a deficient number, since it is larger than the sum of its proper divisors (1101019620830).

1221010020130 is a wasteful number, since it uses less digits than its factorization.

1221010020130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23713834.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1221010020130 its reverse (310200101221), we get a palindrome (1531210121351).

The spelling of 1221010020130 in words is "one trillion, two hundred twenty-one billion, ten million, twenty thousand, one hundred thirty".