21220110021099 has 16 divisors (see below), whose sum is σ = 32681238963840. Its totient is φ = 12104162578560.

The previous prime is 21220110021079. The next prime is 21220110021107. The reversal of 21220110021099 is 99012001102212.

It is not a de Polignac number, because 21220110021099 - 2³⁶ = 21151390544363 is a prime.

It is a super-3 number, since 3×21220110021099³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21220110021029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18912753469 + ... + 18912754590.

It is an arithmetic number, because the mean of its divisors is an integer number (2042577435240).

Almost surely, 2^{21220110021099} is an apocalyptic number.

21220110021099 is a deficient number, since it is larger than the sum of its proper divisors (11461128942741).

21220110021099 is a wasteful number, since it uses less digits than its factorization.

21220110021099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37825508090.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 21220110021099 in words is "twenty-one trillion, two hundred twenty billion, one hundred ten million, twenty-one thousand, ninety-nine".