1021020001222 has 16 divisors (see below), whose sum is σ = 1649358883872. Its totient is φ = 471234605760.

The previous prime is 1021020001193. The next prime is 1021020001229. The reversal of 1021020001222 is 2221000201201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021020001229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2920263 + ... + 3251149.

It is an arithmetic number, because the mean of its divisors is an integer number (103084930242).

Almost surely, 2^{1021020001222} is an apocalyptic number.

1021020001222 is a deficient number, since it is larger than the sum of its proper divisors (628338882650).

1021020001222 is a wasteful number, since it uses less digits than its factorization.

1021020001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449583.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1021020001222 its reverse (2221000201201), we get a palindrome (3242020202423).

The spelling of 1021020001222 in words is "one trillion, twenty-one billion, twenty million, one thousand, two hundred twenty-two".