1021213222401 has 32 divisors (see below), whose sum is σ = 1454156301312. Its totient is φ = 635934720960.

The previous prime is 1021213222399. The next prime is 1021213222409. The reversal of 1021213222401 is 1042223121201.

It is a happy number.

It is not a de Polignac number, because 1021213222401 - 2¹ = 1021213222399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021213222409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15761011 + ... + 15825671.

It is an arithmetic number, because the mean of its divisors is an integer number (45442384416).

Almost surely, 2^{1021213222401} is an apocalyptic number.

It is an amenable number.

1021213222401 is a deficient number, since it is larger than the sum of its proper divisors (432943078911).

1021213222401 is a wasteful number, since it uses less digits than its factorization.

1021213222401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70053.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1021213222401 its reverse (1042223121201), we get a palindrome (2063436343602).

The spelling of 1021213222401 in words is "one trillion, twenty-one billion, two hundred thirteen million, two hundred twenty-two thousand, four hundred one".