1020021221994 has 16 divisors (see below), whose sum is σ = 2110388735520. Its totient is φ = 328282692080.

The previous prime is 1020021221993. The next prime is 1020021222041. The reversal of 1020021221994 is 4991221200201.

1020021221994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1020021221993) 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, 2931095292 + ... + 2931095639.

It is an arithmetic number, because the mean of its divisors is an integer number (131899295970).

Almost surely, 2^{1020021221994} is an apocalyptic number.

1020021221994 is an abundant number, since it is smaller than the sum of its proper divisors (1090367513526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020021221994 is a wasteful number, since it uses less digits than its factorization.

1020021221994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5862190965.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 1020021221994 in words is "one trillion, twenty billion, twenty-one million, two hundred twenty-one thousand, nine hundred ninety-four".