1221131411401 has 16 divisors (see below), whose sum is σ = 1364863526208. Its totient is φ = 1082861740800.

The previous prime is 1221131411393. The next prime is 1221131411477. The reversal of 1221131411401 is 1041141311221.

It is a cyclic number.

It is not a de Polignac number, because 1221131411401 - 2³ = 1221131411393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221131441401) 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, 2501365 + ... + 2949421.

It is an arithmetic number, because the mean of its divisors is an integer number (85303970388).

Almost surely, 2^{1221131411401} is an apocalyptic number.

1221131411401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1221131411401 is a deficient number, since it is larger than the sum of its proper divisors (143732114807).

1221131411401 is a wasteful number, since it uses less digits than its factorization.

1221131411401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454152.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 1221131411401 its reverse (1041141311221), we get a palindrome (2262272722622).

The spelling of 1221131411401 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-one million, four hundred eleven thousand, four hundred one".