211223132988 has 48 divisors (see below), whose sum is σ = 578484985344. Its totient is φ = 58718399040.

The previous prime is 211223132983. The next prime is 211223132993. The reversal of 211223132988 is 889231322112.

It is an interprime number because it is at equal distance from previous prime (211223132983) and next prime (211223132993).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211223132983) 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, 33977448 + ... + 33983663.

It is an arithmetic number, because the mean of its divisors is an integer number (12051770528).

Almost surely, 2^211223132988 is an apocalyptic number.

211223132988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

211223132988 is an abundant number, since it is smaller than the sum of its proper divisors (367261852356).

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

211223132988 is a wasteful number, since it uses less digits than its factorization.

211223132988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67961162 (or 67961160 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The spelling of 211223132988 in words is "two hundred eleven billion, two hundred twenty-three million, one hundred thirty-two thousand, nine hundred eighty-eight".