1022222100021 has 16 divisors (see below), whose sum is σ = 1435045483200. Its totient is φ = 645457448448.

The previous prime is 1022222100019. The next prime is 1022222100037. The reversal of 1022222100021 is 1200012222201.

1022222100021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1022222100021 - 2¹ = 1022222100019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022222100121) 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, 1936326 + ... + 2407031.

It is an arithmetic number, because the mean of its divisors is an integer number (89690342700).

Almost surely, 2^{1022222100021} is an apocalyptic number.

It is an amenable number.

1022222100021 is a deficient number, since it is larger than the sum of its proper divisors (412823383179).

1022222100021 is a wasteful number, since it uses less digits than its factorization.

1022222100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4347508.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1022222100021 its reverse (1200012222201), we get a palindrome (2222234322222).

The spelling of 1022222100021 in words is "one trillion, twenty-two billion, two hundred twenty-two million, one hundred thousand, twenty-one".