21221001202010 has 8 divisors (see below), whose sum is σ = 38197802163636. Its totient is φ = 8488400480800.

The previous prime is 21221001202007. The next prime is 21221001202013. The reversal of 21221001202010 is 1020210012212.

It is an interprime number because it is at equal distance from previous prime (21221001202007) and next prime (21221001202013).

It can be written as a sum of positive squares in 2 ways, for example, as 19654406022241 + 1566595179769 = 4433329^2 + 1251637^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21221001202013) 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, 1061050060091 + ... + 1061050060110.

Almost surely, 2^{21221001202010} is an apocalyptic number.

21221001202010 is a deficient number, since it is larger than the sum of its proper divisors (16976800961626).

21221001202010 is a wasteful number, since it uses less digits than its factorization.

21221001202010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122100120208.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21221001202010 its reverse (1020210012212), we get a palindrome (22241211214222).

The spelling of 21221001202010 in words is "twenty-one trillion, two hundred twenty-one billion, one million, two hundred two thousand, ten".