1021220021002 has 16 divisors (see below), whose sum is σ = 1649951566560. Its totient is φ = 472486128912.

The previous prime is 1021220020939. The next prime is 1021220021023. The reversal of 1021220021002 is 2001200221201.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312489193 + ... + 312492460.

It is an arithmetic number, because the mean of its divisors is an integer number (103121972910).

Almost surely, 2^{1021220021002} is an apocalyptic number.

1021220021002 is a deficient number, since it is larger than the sum of its proper divisors (628731545558).

1021220021002 is a wasteful number, since it uses less digits than its factorization.

1021220021002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624981717.

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

Adding to 1021220021002 its reverse (2001200221201), we get a palindrome (3022420242203).

The spelling of 1021220021002 in words is "one trillion, twenty-one billion, two hundred twenty million, twenty-one thousand, two".