211220100102 has 24 divisors (see below), whose sum is σ = 464335097688. Its totient is φ = 64006090720.

The previous prime is 211220100079. The next prime is 211220100103. The reversal of 211220100102 is 201001022112.

It is a super-2 number, since 2×211220100102² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220100103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145467663 + ... + 145469114.

It is an arithmetic number, because the mean of its divisors is an integer number (19347295737).

Almost surely, 2^211220100102 is an apocalyptic number.

211220100102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211220100102 is an abundant number, since it is smaller than the sum of its proper divisors (253114997586).

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

211220100102 is a wasteful number, since it uses less digits than its factorization.

211220100102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290936804 (or 290936793 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 211220100102 its reverse (201001022112), we get a palindrome (412221122214).

It can be divided in two parts, 2112 and 20100102, that multiplied together give a palindrome (42451415424).

The spelling of 211220100102 in words is "two hundred eleven billion, two hundred twenty million, one hundred thousand, one hundred two".