21122271401 has 32 divisors (see below), whose sum is σ = 27897219072. Its totient is φ = 15483029760.

The previous prime is 21122271377. The next prime is 21122271413. The reversal of 21122271401 is 10417222112.

It is not a de Polignac number, because 21122271401 - 2²⁶ = 21055162537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21122271701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5243150 + ... + 5247176.

It is an arithmetic number, because the mean of its divisors is an integer number (871788096).

Almost surely, 2^21122271401 is an apocalyptic number.

It is an amenable number.

21122271401 is a deficient number, since it is larger than the sum of its proper divisors (6774947671).

21122271401 is a wasteful number, since it uses less digits than its factorization.

21122271401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 21122271401 its reverse (10417222112), we get a palindrome (31539493513).

The spelling of 21122271401 in words is "twenty-one billion, one hundred twenty-two million, two hundred seventy-one thousand, four hundred one".