10102021222021 has 4 divisors (see below), whose sum is σ = 10109443722444. Its totient is φ = 10094598721600.

The previous prime is 10102021221989. The next prime is 10102021222031. The reversal of 10102021222021 is 12022212020101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 506808729025 + 9595212492996 = 711905^2 + 3097614^2 .

It is a cyclic number.

It is not a de Polignac number, because 10102021222021 - 2⁵ = 10102021221989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10102021221986 and 10102021222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10102021222031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3711248170 + ... + 3711250891.

It is an arithmetic number, because the mean of its divisors is an integer number (2527360930611).

Almost surely, 2^{10102021222021} is an apocalyptic number.

It is an amenable number.

10102021222021 is a deficient number, since it is larger than the sum of its proper divisors (7422500423).

10102021222021 is an equidigital number, since it uses as much as digits as its factorization.

10102021222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7422500422.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 10102021222021 its reverse (12022212020101), we get a palindrome (22124233242122).

The spelling of 10102021222021 in words is "ten trillion, one hundred two billion, twenty-one million, two hundred twenty-two thousand, twenty-one".